pressure (bead?) filters are like those used for swimming pools. they
work for a while and then they go anaerobic. ponds are much dirtier
than swimming pools. you need to increase the number of plants in the
veggie fitler. also, consider just a simple bucket filter with some
polyester batting in conjuntion. I had green water earlier. I used
my bucket filter and fed my koi only freeze dried krill and dapnia and
the water is clear to the bottom. have not turned on my UV at all.
Ingrid

On Sun, 29 Apr 2007 18:53:28 -0400, "Promextheus Xex"
wrote:
I was thinking of getting a pressure filter with a built-in UV for a pond
that's near 4000 gals. I have a small pond off to the side that's about 60"
dia and 18" deep. I usually grow some plants in that and the water flows
from there into the main pond via a small stream.

The pressure filter is about $700. I want to try to control the greenness
this year. Are they good and worth it?

Here are a couple that I was looking at:

http://www.petsandponds.com/securestore/c237479.2.html
http://www.petsandponds.com/securest...6504903.2.html

- Prometheus Xex